def create_write_file():
    filename = input("请输入一个文件名：")
    text = input("请输入要写入的内容：")
    file = open(filename,"w")
    file.write(text)
    print(f"文件{filename}创建并写入成功！")

def read():
    filename = input("请输入要读取的文件名：")
    try:
        file = open(filename,"r")
        content = file.read()
        print("文件内容为：",content)
    except FileNotFoundError:
        print(f"{filename}未找到")

def read_file():
    filename = input("请输入文件名：")
    text = input("请输入要追加的内容：")
    file = open(filename, "a")
    file.write(text)
    print(f"文件{filename}已追加成功！！")

def myNotebook():
    while True:
        print("简单记事本软件")
        print("1.创建并写入文件")
        print("2.读取文件")
        print("3.追加文本到文件")
        print("4.退出！")

        choice = input("请输入选项编号")
        if choice == "1":
            create_write_file()#
        elif choice == "2":
            read()#
        elif choice == "3":
            read_file()#
        elif choice == "4":
            break#
if __name__ == "__main__":
    myNotebook();